A recognized Society of a neutral country can only lend the assistance of its medical personnel and units to a Party to the conflict with the previous consent of its own Government and the authorization of the Party to the conflict concerned. That personnel and those units shall be placed under the control of that Party to the conflict. The neutral Government shall notify this consent to the adversary of the State which accepts such assistance. The Party to the conflict who accepts such assistance is bound to notify the adverse Party thereof before making any use of it. In no circumstances shall this assistance be considered as interference in the conflict. The members of the personnel named in the first paragraph shall be duly furnished with the identity cards provided for in Article 40 before leaving the neutral country to which they belong.